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Pulleys and Gears
Angela Royston
Paperback (Heinemann, July 3, 2003)What pulls a flag up a flagpole? How does a bicycle chain help the bicycle move? What makes an escalator move? Pulleys and gears are simple machines that can be used to make other machines work. When you take an escalator, ride in a car, use a fishing rod, or wear a watch you are using pulleys and gears. Pulleys and Gears explains what these machines are and how they help you do everyday things.
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Ramps and Wedges
Angela Royston
Library Binding (Heinemann/Raintree, Jan. 1, 2001)Explains how ramps and wedges work as simple machines to make such objects as cutters, jackhammers, and zippers work, and suggests ways to use them in everyday life.
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Ramps and Wedges
Angela Royston
Paperback (Heinemann, July 3, 2003)Why do skiers use a zigzag path down steep slopes? How does a zipper work? How does a lock work? Ramp and wedges are simple machines that can be used to make other machines work. When you open a lock, cut something with scissors, zip up your coat, or use a doorstop you are using ramps or wedges. Ramps and Wedges explains what these machines are and how they help you do everyday things.
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Pulleys and Gears
Angela Royston
Library Binding (Heinemann/Raintree, Jan. 1, 2001)Explains how pulleys and gears work as simple machines to make such objects as watches, bicycles, and trolleys work, and suggests ways to use pulleys in everyday life.
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Pulleys and Gears by Royston, Angela
Royston
Paperback (Heinemann, 2003, )Pulleys and Gears by Royston, Angela [Heinemann, 2003] Paperback [Paperback] ...